Auxiliary scribing device for measuring longitudinal retraction rate of pipe

Abstract

The utility model relates to an auxiliary lineation device for measuring the longitudinal retraction rate of a pipe, which comprises a base, a rotary fixing assembly and a lineation assembly, the rotary fixing assembly comprises a fixing plate connected with the base, a rotating shaft horizontally arranged and rotationally connected with the fixing plate, and an elastic abutting part mounted on the rotating shaft; the number of the elastic abutting parts is two, the two elastic abutting parts are arranged at the positions, close to the two ends of the rotating shaft, of the rotating shaft respectively, each elastic abutting part is provided with a plurality of abutting ends evenly arranged in the circumferential direction of the rotating shaft, and each abutting end moves in the direction close to or away from the rotating shaft under the elastic acting force. The rotating shaft abuts against the inner wall of the pipe so that the pipe can be fixed to the rotating shaft; the problems that due to the fact that a U-shaped structure is only matched with a pipe with the single diameter, when different pipes are marked, limiting structures of corresponding sizes need to be replaced, and use is inconvenient are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of pipe marking devices, in particular to an auxiliary marking device for measuring the longitudinal shrinkage rate of pipes. Background Art

[0002] The longitudinal shrinkage rate is an important indicator of the performance of plastic pipe products. Before measurement, it is necessary to use a marking device to mark the pipes.

[0003] For example, a pipe marking device proposed in the utility model patent with the application number CN202321215846.8, a plastic pipe marking device, wherein the support base is of a U-shaped structure, a U-shaped chute is arranged at the connection between the support base and the annular part, an annular slider is arranged on the outer surface of the annular part, the annular slider is slidably connected with the U-shaped chute, a rubber sleeve is sleeved on the outer surface of the driving wheel to increase the friction between the driving wheel and the plastic pipe and drive the plastic pipe to rotate.

[0004] To facilitate the driving wheel to drive the pipe to rotate, it is necessary to limit the position of the pipe through a U-shaped structure. However, the U-shaped structure only adapts to pipes of a single diameter, so that when marking different pipes, it is necessary to replace the corresponding size of the limiting structure, which is inconvenient to use. Summary of the Utility Model

[0005] In view of this, it is necessary to provide an auxiliary marking device for measuring the longitudinal shrinkage rate of pipes to solve the problem that the U-shaped structure only adapts to pipes of a single diameter, so that when marking different pipes, it is necessary to replace the corresponding size of the limiting structure, which is inconvenient to use.

[0006] The utility model provides an auxiliary marking device for measuring the longitudinal shrinkage rate of pipes, including a base, a rotation fixing component and a marking component. The rotation fixing component includes a fixing plate connected to the base, a rotating shaft horizontally arranged and rotatably connected to the fixing plate, and an elastic abutting part installed on the rotating shaft. The number of the elastic abutting parts is two, and the two elastic abutting parts are respectively arranged at positions close to both ends of the rotating shaft. The elastic abutting part has a plurality of abutting ends arranged circumferentially and uniformly along the rotating shaft. Each abutting end moves in a direction close to or away from the rotating shaft under the action of elastic force and abuts against the inner wall of the pipe to fix the pipe to the rotating shaft. The marking component includes a marking end connected to the base.

[0007] Further, the elastic abutting portion includes a fixed rod, a rotating rod, a roller and a spring. One end of the fixed rod is fixedly connected to the rotating shaft, the other end of the fixed rod is hinged to one end of the rotating rod, the other end of the rotating rod is connected to the roller, and both ends of the spring are connected to the fixed rod and the rotating rod, forming an obtuse angle between the fixed rod and the rotating rod.

[0008] Further, the rotation axes of the plurality of rollers in the two elastic abutting portions are all arranged parallel to the rotating shaft, and the rotation axes of the corresponding plurality of rotating rods are all arranged parallel to the rotating shaft.

[0009] Further, the rotation axes of the plurality of rollers in the elastic abutting portion close to the fixed plate are arranged parallel to the rotating shaft, and the rotation axes of the corresponding plurality of rotating rods are arranged parallel to the rotating shaft. The rotation axes of the plurality of rollers in the elastic abutting portion far from the fixed plate are arranged perpendicular to the rotating shaft, and the rotation axes of the corresponding plurality of rotating rods are arranged perpendicular to the rotating shaft.

[0010] Further, the rotation fixing assembly further includes a plurality of driving rods corresponding to the plurality of rotating rods one by one and a connecting ring. The plurality of driving rods are respectively in sliding contact with the corresponding ones, the plurality of driving rods are fixedly connected to the connecting ring, and the connecting ring is rotatably connected to the base. The rotation of the connecting ring drives the plurality of driving rods to rotate synchronously, so as to drive the plurality of rotating rods to move towards the direction close to the rotating shaft against the elastic force of the spring.

[0011] Further, a plurality of arc-shaped waist slots are formed on the base, and the plurality of driving rods are respectively in sliding connection with the plurality of arc-shaped waist slots.

[0012] Further, it further includes a first handle installed at the end of the rotating shaft.

[0013] Further, it further includes a second handle installed on the connecting ring.

[0014] Further, the scribing assembly includes a swing arm rotatably connected to the base at one end and a scribing wheel connected to the other end of the swing arm. The swing arm rotates relative to the base to a position where the scribing wheel abuts or is spaced from the pipe.

[0015] Further, it further includes a limiting assembly. The limiting assembly is arranged at one end of the rotating shaft far from the rotation fixing assembly. The limiting assembly includes a guide rail, a slider and a stopper. The guide rail is arranged parallel to the rotating shaft and fixedly connected to the base. The slider is slidably connected to the guide rail. The top of the slider is fixedly connected to the stopper, and the stopper is used to abut against one end of the pipe far from the rotation fixing assembly.

[0016] Compared with the prior art, the pipe sleeve to be marked is sleeved on the rotating shaft. By squeezing the multiple abutting parts in the elastic abutting part, the multiple abutting ends move in the direction close to the rotating shaft until the pipe is completely sleeved on the rotating shaft. The multiple abutting parts in the elastic abutting part reset under the elastic force and abut against the inner wall of the pipe, thereby completing the positioning between the pipe and the rotating shaft. The abutting ends moving to different positions can adapt to pipes with different diameters. By rotating the rotating shaft and cooperating with the marking assembly, the pipe can be driven to rotate and the marking end of the marking assembly can mark the pipe, which is convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 FIG. is a schematic structural diagram of the overall structure in the auxiliary marking device for measuring the longitudinal shrinkage rate of a pipe provided by an embodiment of the present invention;

[0018] Figure 2 for the auxiliary marking device for measuring the longitudinal shrinkage rate of a pipe provided by an embodiment of the present invention Figure 1 cross-sectional view taken along line A-A;

[0019] Figure 3 for the auxiliary marking device for measuring the longitudinal shrinkage rate of a pipe provided by an embodiment of the present invention Figure 2 cross-sectional view taken along line B-B;

[0020] Figure 4 FIG. is a schematic structural diagram of the fixing plate in the auxiliary marking device for measuring the longitudinal shrinkage rate of a pipe provided by an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] The following will specifically describe the preferred embodiments of the present invention with reference to the accompanying drawings. The accompanying drawings form a part of this application and are used together with the embodiments of the present invention to explain the principle of the present invention, and are not used to limit the scope of the present invention.

[0022] As Figure 1-2 shown, the auxiliary marking device for measuring the longitudinal shrinkage rate of a pipe provided by the present invention includes a base 100, a rotation fixing assembly 200 and a marking assembly 300. The rotation fixing assembly 200 includes a fixing plate 210 connected to the base 100, a rotating shaft 220 horizontally arranged and rotatably connected to the fixing plate 210, and an elastic abutting part 230 mounted on the rotating shaft 220. The number of the elastic abutting parts 230 is two, and the two elastic abutting parts 230 are respectively arranged at positions close to both ends of the rotating shaft 220. The elastic abutting part 230 has a plurality of abutting ends arranged uniformly along the circumferential direction of the rotating shaft 220. Each abutting end moves in the direction close to or away from the rotating shaft 220 under the elastic force and abuts against the inner wall of the pipe to fix the pipe to the rotating shaft 220. The marking assembly 300 includes a marking end connected to the base 100.

[0023] The pipe sleeve to be marked is sleeved on the rotating shaft 220. By squeezing the multiple abutting parts in the elastic abutting part 230, the multiple abutting ends move in the direction close to the rotating shaft 220 until the pipe is completely sleeved on the rotating shaft 220. The multiple abutting parts in the elastic abutting part 230 reset under the elastic force and abut against the inner wall of the pipe, thus completing the positioning between the pipe and the rotating shaft 220. The abutting ends can move to different positions to adapt to pipes with different diameters. By rotating the rotating shaft 220 and cooperating with the marking assembly 300, the pipe can be driven to rotate and the marking end of the marking assembly 300 can mark the pipe, which is convenient to use.

[0024] As Figure 3 shown, the rotating and fixing assembly 200 in this implementation scheme is used to adapt to pipes with different diameters and relatively fix the pipe and the rotating shaft 220. Among them, the elastic abutting part 230 includes a fixing rod 231, a rotating rod 232, a roller 233 and a spring 234. One end of the fixing rod 231 is fixedly connected to the rotating shaft 220, the other end of the fixing rod 231 is hinged to one end of the rotating rod 232, the other end of the rotating rod 232 is connected to the roller 233, and the two ends of the spring 234 are connected to the fixing rod 231 and the rotating rod 232, so that an obtuse angle is formed between the fixing rod 231 and the rotating rod 232. Under the action of the spring 234, the rotating rod 232 moves in the direction away from the rotating shaft 220, so that the multiple rollers 233 abut against the inner wall of the pipe.

[0025] In one embodiment, the rotation axes of the multiple rollers 233 in the two elastic abutting parts 230 are all arranged parallel to the rotating shaft 220, and the rotation axes of the corresponding multiple rotating rods 232 are all arranged parallel to the rotating shaft 220.

[0026] In another embodiment, the rotation axes of the multiple rollers 233 in the elastic abutting part 230 close to the fixed plate 210 are arranged parallel to the rotating shaft 220, and the rotation axes of the corresponding multiple rotating rods 232 are arranged parallel to the rotating shaft 220. The rotation axes of the multiple rollers 233 in the elastic abutting part 230 far from the fixed plate 210 are arranged perpendicular to the rotating shaft 220, and the rotation axes of the corresponding multiple rotating rods 232 are arranged perpendicular to the rotating shaft 220.

[0027] During the process of inserting the pipe, the spring 234 in the elastic abutting part 230 far from the fixed plate 210 automatically contracts, facilitating the movement of the pipe along the length direction of the rotating shaft 220 and guiding the pipe. At the same time, under the action of friction, the multiple rollers 233 with rotation axes parallel to the rotating shaft 220 can limit the axial movement of the pipe relative to the rotating shaft 220, and the multiple rollers 233 with rotation axes perpendicular to the rotating shaft 220 can limit the circumferential rotation of the pipe relative to the rotating shaft 220.

[0028] For the convenience of driving the rotating rod 232 to rotate relative to the fixed rod 231, in one embodiment, the rotating and fixing assembly 200 further includes a plurality of driving rods 240 corresponding to the plurality of rotating rods 232 one by one and a connecting ring 250. The plurality of driving rods 240 are respectively in sliding contact with the corresponding ones, the plurality of driving rods 240 are fixedly connected to the connecting ring 250, and the connecting ring 250 is rotatably connected to the base 100. The rotation of the connecting ring drives the plurality of driving rods 240 to rotate synchronously, so as to drive the plurality of rotating rods 232 to move in the direction close to the rotating shaft 220 against the elastic force of the spring 234.

[0029] As Figure 4 shown, wherein, a plurality of arc-shaped waist slots 211 are formed in the base 100, and the plurality of driving rods 240 are respectively slidably connected to the plurality of arc-shaped waist slots 211.

[0030] For the convenience of rotating the rotating shaft 220 for scribing, a first handle 221 is further included in this embodiment and is installed at the end of the rotating shaft 220.

[0031] For the convenience of rotating the connecting ring 250, a second handle 251 is further included in this embodiment and is installed on the connecting ring 250.

[0032] The scribing assembly 300 in this embodiment includes a swing arm 310 rotatably connected to the base 100 at one end and a scribing wheel 320 connected to the other end of the swing arm 310. The swing arm 310 rotates relative to the base 100 to a position where the scribing wheel 320 abuts against or is spaced from the pipe.

[0033] A limiting assembly 400 is further included in this embodiment. The limiting assembly 400 is arranged at one end of the rotating shaft 220 far from the rotating and fixing assembly 200. The limiting assembly 400 includes a guide rail 410, a slider 420 and a stop block 430. The guide rail 410 is arranged parallel to the rotating shaft 220 and is fixedly connected to the base 100. The slider 420 is slidably connected to the guide rail 410. The top of the slider 420 is fixedly connected to the stop block 430. The stop block 430 is used to abut against one end of the pipe far from the rotating and fixing assembly 200.

[0034] Compared with the prior art: The pipe to be scribed is sleeved on the rotating shaft 220. By squeezing the plurality of abutting parts in the elastic abutting part 230, the plurality of abutting ends move in the direction close to the rotating shaft 220 until the pipe is completely sleeved on the rotating shaft 220. The plurality of abutting parts in the elastic abutting part 230 reset under the elastic force and abut against the inner wall of the pipe, thereby completing the positioning between the pipe and the rotating shaft 220. The abutting ends moving to different positions can adapt to pipes of different diameters. By rotating the rotating shaft 220 and cooperating with the scribing assembly 300, the pipe can be driven to rotate and the scribing end of the scribing assembly 300 can scribe the pipe, which is convenient to use.

[0035] The above are only the preferred specific embodiments of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present utility model should be covered within the protection scope of the present utility model.

Claims

1. An auxiliary scribing device for measuring the longitudinal shrinkage rate of pipes, characterized in that It includes a base, a rotary fixing component and a scribing component; The rotary fixing component includes a fixing plate connected to the base, a rotating shaft horizontally arranged and rotatably connected to the fixing plate, and an elastic abutting part mounted on the rotating shaft. The number of the elastic abutting parts is two, and the two elastic abutting parts are respectively arranged at positions near both ends of the rotating shaft. The elastic abutting part has a plurality of abutting ends arranged uniformly along the circumferential direction of the rotating shaft. Each abutting end moves in a direction close to or away from the rotating shaft under the elastic force, and abuts against the inner wall of the pipe to fix the pipe to the rotating shaft; The scribing component includes a scribing end connected to the base.

2. The auxiliary scribing device for measuring the longitudinal retraction rate of the pipe according to claim 1, wherein, The elastic abutting part includes a fixing rod, a rotating rod, a roller and a spring. One end of the fixing rod is fixedly connected to the rotating shaft, the other end of the fixing rod is hinged to one end of the rotating rod, the other end of the rotating rod is connected to the roller, and both ends of the spring are connected to the fixing rod and the rotating rod, so that an obtuse angle is formed between the fixing rod and the rotating rod.

3. The auxiliary scribing device for measuring the longitudinal retraction rate of the pipe according to claim 2, characterized in that, The rotation axes of the plurality of rollers in the two elastic abutting parts are all arranged parallel to the rotating shaft, and the rotation axes of the corresponding plurality of rotating rods are all arranged parallel to the rotating shaft.

4. The auxiliary scribing device for measuring the longitudinal shrinkage rate of the pipe according to claim 2, wherein The rotation axes of the plurality of rollers in the elastic abutting part close to the fixing plate are arranged parallel to the rotating shaft, and the rotation axes of the corresponding plurality of rotating rods are arranged parallel to the rotating shaft. The rotation axes of the plurality of rollers in the elastic abutting part far from the fixing plate are perpendicular to the rotating shaft, and the rotation axes of the corresponding plurality of rotating rods are perpendicular to the rotating shaft.

5. The auxiliary scribing device for measuring the longitudinal shrinkage rate of the pipe according to claim 2, wherein, The rotary fixing component further includes a plurality of driving rods corresponding to the plurality of rotating rods one by one and a connecting ring. The plurality of driving rods are respectively in sliding contact with the corresponding ones, the plurality of driving rods are fixedly connected to the connecting ring, and the connecting ring is rotatably connected to the base. The rotation of the connecting ring drives the plurality of driving rods to rotate synchronously, so as to drive the plurality of rotating rods to move in a direction close to the rotating shaft against the elastic force of the spring.

6. The auxiliary scribing device for measuring the longitudinal shrinkage rate of the pipe according to claim 5, characterized in that, A plurality of arc-shaped waist slots are formed in the base, and the plurality of driving rods are respectively in sliding connection with the plurality of arc-shaped waist slots.

7. The auxiliary scribing device for measuring the longitudinal shrinkage rate of the pipe according to claim 1, characterized in that, It further includes a first handle mounted at the end of the rotating shaft.

8. The auxiliary scribing device for measuring the longitudinal retraction rate of the pipe according to claim 5, characterized in that It further includes a second handle mounted on the connecting ring.

9. The auxiliary scribing device for measuring the longitudinal retraction rate of the pipe according to claim 1, wherein, The scribing component includes a swing arm rotatably connected to the base at one end and a scribing wheel connected to the other end of the swing arm. The swing arm rotates relative to the base to a position where the scribing wheel abuts against or is spaced from the pipe.

10. The auxiliary scribing device for measuring the longitudinal shrinkage rate of the pipe according to claim 1, wherein It further includes a limiting component. The limiting component is arranged at one end of the rotating shaft far from the rotary fixing component. The limiting component includes a guide rail, a slider and a stop block. The guide rail is arranged parallel to the rotating shaft and fixedly connected to the base. The slider is in sliding connection with the guide rail. The top of the slider is fixedly connected to the stop block, and the stop block is used for abutting against one end of the pipe far from the rotary fixing component.

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